How can tartar and plaque be removed from teeth without grinding? is there any paste, etc. for it?
The girders of a suspension bridge form an arc. The definition of an arc is a curve or bowed shape, like a part of a circle. An example of an arc is a rainbow. To arc is defined as to make a curved shape or move in a curved path.
Arc - Biology. 1  Arc (protein), a name of product of an immediate early gene, also called Arg3.1. 2  Arc system, a 2-component system found in prokaryotes, used to detect cellular redox poise.